A young man is hiding, or trapped, in a hotel in Amsterdam; his furtiveness makes you think of a character from one of Patricia Highsmith’s slim novels. But this is a very fat novel, and it’s extremely good. The man, Theo Decker, tells us his life story. On a day he didn’t go to school, at the age of 13, he says, he went to the Metropolitan Museum of Art in New York with his mother. Suddenly: bang! There’s an explosion, there are bodies, his mother has disappeared, and Theo crawls from the wreckage with an Old Master painting by the Dutch artist Fabritius. A twisting Dickensian adventure follows, as Theo, a superlative narrator, gets sucked towards his destiny.